Hey Dave:

For what it's worth.. I built a plug for fuel tank for a Starjet several years ago. It puts 75 ounces of fuel as close to the CG as possible and it leaves plenty of room for the air trap BV sells.

I glued my tank in with 'Great Stuff', the a foam adheasive. It made the fuse as solid as a baseball bat.

If any of you guys want the plug, I'd be happy to part with it for shipping cost.

Scott